Visible and dark matter from a first-order phase transition in a baryon-symmetric universe

被引：51

作者：

Petraki, Kalliopi ^{[1
]}

Trodden, Mark ^{[2
]}

Volkas, Raymond R. ^{[1
]}

机构：

[1] Univ Melbourne, Sch Phys, ARC Ctr Excellence Particle Phys Terascale, Melbourne, Vic 3010, Australia

[2] Univ Penn, Dept Phys & Astron, Ctr Particle Cosmol, Philadelphia, PA 19104 USA

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2012年 / 02期

基金：

澳大利亚研究理事会;

关键词：

dark matter theory; leptogenesis; baryon asymmetry; cosmological phase transitions; INTERACTION CROSS-SECTION; MIRROR MATTER; BARYOGENESIS; NUMBER; CONSTRAINTS; ORIGIN;

D O I：

10.1088/1475-7516/2012/02/044

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The similar cosmological abundances observed for visible and dark matter suggest a common origin for both. By viewing the dark matter density as a dark-sector asymmetry, mirroring the situation in the visible sector, we show that the visible and dark matter asyrnrnetries may have arisen simultaneously through a first-order phase transition in the early universe. The dark asymmetry can then be equal and opposite to the usual visible matter asymmetry, leading to a universe that is symmetric with respect to a generalised baryon number. We present both a general structure, and a precisely defined example of a viable model of this type. In that example, the dark matter is "atomic" as well as asymmetric, and various cosmological and astrophysical constraints are derived. Testable consequences for colliders include a Z' boson that couples through the B - L charge to the visible sector, but also decays invisibly to dark sector particles. The additional scalar particles in the theory can mix with the standard Higgs boson and provide other striking signatures.

引用

页数：26

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